/ Dictionary / Index U UNIX: Meaning and Definition of Find definitions for: UNIX Pronunciation: (y'niks), [key] a multiuser, multitasking computer operating system. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: unix (Thesaurus) univocal unjaundiced Related Content Daily Word Quiz: industrious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language